1// Copyright 2005, Google Inc. 2// All rights reserved. 3// 4// Redistribution and use in source and binary forms, with or without 5// modification, are permitted provided that the following conditions are 6// met: 7// 8// * Redistributions of source code must retain the above copyright 9// notice, this list of conditions and the following disclaimer. 10// * Redistributions in binary form must reproduce the above 11// copyright notice, this list of conditions and the following disclaimer 12// in the documentation and/or other materials provided with the 13// distribution. 14// * Neither the name of Google Inc. nor the names of its 15// contributors may be used to endorse or promote products derived from 16// this software without specific prior written permission. 17// 18// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29// 30// Author: wan@google.com (Zhanyong Wan), vladl@google.com (Vlad Losev) 31// 32// This file implements death tests. 33 34#include "gtest/gtest-death-test.h" 35#include "gtest/internal/gtest-port.h" 36 37#if GTEST_HAS_DEATH_TEST 38 39# if GTEST_OS_MAC 40# include <crt_externs.h> 41# endif // GTEST_OS_MAC 42 43# include <errno.h> 44# include <fcntl.h> 45# include <limits.h> 46# include <stdarg.h> 47 48# if GTEST_OS_WINDOWS 49# include <windows.h> 50# else 51# include <sys/mman.h> 52# include <sys/wait.h> 53# endif // GTEST_OS_WINDOWS 54 55#endif // GTEST_HAS_DEATH_TEST 56 57#include "gtest/gtest-message.h" 58#include "gtest/internal/gtest-string.h" 59 60// Indicates that this translation unit is part of Google Test's 61// implementation. It must come before gtest-internal-inl.h is 62// included, or there will be a compiler error. This trick is to 63// prevent a user from accidentally including gtest-internal-inl.h in 64// his code. 65#define GTEST_IMPLEMENTATION_ 1 66#include "src/gtest-internal-inl.h" 67#undef GTEST_IMPLEMENTATION_ 68 69namespace testing { 70 71// Constants. 72 73// The default death test style. 74static const char kDefaultDeathTestStyle[] = "fast"; 75 76GTEST_DEFINE_string_( 77 death_test_style, 78 internal::StringFromGTestEnv("death_test_style", kDefaultDeathTestStyle), 79 "Indicates how to run a death test in a forked child process: " 80 "\"threadsafe\" (child process re-executes the test binary " 81 "from the beginning, running only the specific death test) or " 82 "\"fast\" (child process runs the death test immediately " 83 "after forking)."); 84 85GTEST_DEFINE_bool_( 86 death_test_use_fork, 87 internal::BoolFromGTestEnv("death_test_use_fork", false), 88 "Instructs to use fork()/_exit() instead of clone() in death tests. " 89 "Ignored and always uses fork() on POSIX systems where clone() is not " 90 "implemented. Useful when running under valgrind or similar tools if " 91 "those do not support clone(). Valgrind 3.3.1 will just fail if " 92 "it sees an unsupported combination of clone() flags. " 93 "It is not recommended to use this flag w/o valgrind though it will " 94 "work in 99% of the cases. Once valgrind is fixed, this flag will " 95 "most likely be removed."); 96 97namespace internal { 98GTEST_DEFINE_string_( 99 internal_run_death_test, "", 100 "Indicates the file, line number, temporal index of " 101 "the single death test to run, and a file descriptor to " 102 "which a success code may be sent, all separated by " 103 "colons. This flag is specified if and only if the current " 104 "process is a sub-process launched for running a thread-safe " 105 "death test. FOR INTERNAL USE ONLY."); 106} // namespace internal 107 108#if GTEST_HAS_DEATH_TEST 109 110// ExitedWithCode constructor. 111ExitedWithCode::ExitedWithCode(int exit_code) : exit_code_(exit_code) { 112} 113 114// ExitedWithCode function-call operator. 115bool ExitedWithCode::operator()(int exit_status) const { 116# if GTEST_OS_WINDOWS 117 118 return exit_status == exit_code_; 119 120# else 121 122 return WIFEXITED(exit_status) && WEXITSTATUS(exit_status) == exit_code_; 123 124# endif // GTEST_OS_WINDOWS 125} 126 127# if !GTEST_OS_WINDOWS 128// KilledBySignal constructor. 129KilledBySignal::KilledBySignal(int signum) : signum_(signum) { 130} 131 132// KilledBySignal function-call operator. 133bool KilledBySignal::operator()(int exit_status) const { 134 return WIFSIGNALED(exit_status) && WTERMSIG(exit_status) == signum_; 135} 136# endif // !GTEST_OS_WINDOWS 137 138namespace internal { 139 140// Utilities needed for death tests. 141 142// Generates a textual description of a given exit code, in the format 143// specified by wait(2). 144static String ExitSummary(int exit_code) { 145 Message m; 146 147# if GTEST_OS_WINDOWS 148 149 m << "Exited with exit status " << exit_code; 150 151# else 152 153 if (WIFEXITED(exit_code)) { 154 m << "Exited with exit status " << WEXITSTATUS(exit_code); 155 } else if (WIFSIGNALED(exit_code)) { 156 m << "Terminated by signal " << WTERMSIG(exit_code); 157 } 158# ifdef WCOREDUMP 159 if (WCOREDUMP(exit_code)) { 160 m << " (core dumped)"; 161 } 162# endif 163# endif // GTEST_OS_WINDOWS 164 165 return m.GetString(); 166} 167 168// Returns true if exit_status describes a process that was terminated 169// by a signal, or exited normally with a nonzero exit code. 170bool ExitedUnsuccessfully(int exit_status) { 171 return !ExitedWithCode(0)(exit_status); 172} 173 174# if !GTEST_OS_WINDOWS 175// Generates a textual failure message when a death test finds more than 176// one thread running, or cannot determine the number of threads, prior 177// to executing the given statement. It is the responsibility of the 178// caller not to pass a thread_count of 1. 179static String DeathTestThreadWarning(size_t thread_count) { 180 Message msg; 181 msg << "Death tests use fork(), which is unsafe particularly" 182 << " in a threaded context. For this test, " << GTEST_NAME_ << " "; 183 if (thread_count == 0) 184 msg << "couldn't detect the number of threads."; 185 else 186 msg << "detected " << thread_count << " threads."; 187 return msg.GetString(); 188} 189# endif // !GTEST_OS_WINDOWS 190 191// Flag characters for reporting a death test that did not die. 192static const char kDeathTestLived = 'L'; 193static const char kDeathTestReturned = 'R'; 194static const char kDeathTestThrew = 'T'; 195static const char kDeathTestInternalError = 'I'; 196 197// An enumeration describing all of the possible ways that a death test can 198// conclude. DIED means that the process died while executing the test 199// code; LIVED means that process lived beyond the end of the test code; 200// RETURNED means that the test statement attempted to execute a return 201// statement, which is not allowed; THREW means that the test statement 202// returned control by throwing an exception. IN_PROGRESS means the test 203// has not yet concluded. 204// TODO(vladl@google.com): Unify names and possibly values for 205// AbortReason, DeathTestOutcome, and flag characters above. 206enum DeathTestOutcome { IN_PROGRESS, DIED, LIVED, RETURNED, THREW }; 207 208// Routine for aborting the program which is safe to call from an 209// exec-style death test child process, in which case the error 210// message is propagated back to the parent process. Otherwise, the 211// message is simply printed to stderr. In either case, the program 212// then exits with status 1. 213void DeathTestAbort(const String& message) { 214 // On a POSIX system, this function may be called from a threadsafe-style 215 // death test child process, which operates on a very small stack. Use 216 // the heap for any additional non-minuscule memory requirements. 217 const InternalRunDeathTestFlag* const flag = 218 GetUnitTestImpl()->internal_run_death_test_flag(); 219 if (flag != NULL) { 220 FILE* parent = posix::FDOpen(flag->write_fd(), "w"); 221 fputc(kDeathTestInternalError, parent); 222 fprintf(parent, "%s", message.c_str()); 223 fflush(parent); 224 _exit(1); 225 } else { 226 fprintf(stderr, "%s", message.c_str()); 227 fflush(stderr); 228 posix::Abort(); 229 } 230} 231 232// A replacement for CHECK that calls DeathTestAbort if the assertion 233// fails. 234# define GTEST_DEATH_TEST_CHECK_(expression) \ 235 do { \ 236 if (!::testing::internal::IsTrue(expression)) { \ 237 DeathTestAbort(::testing::internal::String::Format( \ 238 "CHECK failed: File %s, line %d: %s", \ 239 __FILE__, __LINE__, #expression)); \ 240 } \ 241 } while (::testing::internal::AlwaysFalse()) 242 243// This macro is similar to GTEST_DEATH_TEST_CHECK_, but it is meant for 244// evaluating any system call that fulfills two conditions: it must return 245// -1 on failure, and set errno to EINTR when it is interrupted and 246// should be tried again. The macro expands to a loop that repeatedly 247// evaluates the expression as long as it evaluates to -1 and sets 248// errno to EINTR. If the expression evaluates to -1 but errno is 249// something other than EINTR, DeathTestAbort is called. 250# define GTEST_DEATH_TEST_CHECK_SYSCALL_(expression) \ 251 do { \ 252 int gtest_retval; \ 253 do { \ 254 gtest_retval = (expression); \ 255 } while (gtest_retval == -1 && errno == EINTR); \ 256 if (gtest_retval == -1) { \ 257 DeathTestAbort(::testing::internal::String::Format( \ 258 "CHECK failed: File %s, line %d: %s != -1", \ 259 __FILE__, __LINE__, #expression)); \ 260 } \ 261 } while (::testing::internal::AlwaysFalse()) 262 263// Returns the message describing the last system error in errno. 264String GetLastErrnoDescription() { 265 return String(errno == 0 ? "" : posix::StrError(errno)); 266} 267 268// This is called from a death test parent process to read a failure 269// message from the death test child process and log it with the FATAL 270// severity. On Windows, the message is read from a pipe handle. On other 271// platforms, it is read from a file descriptor. 272static void FailFromInternalError(int fd) { 273 Message error; 274 char buffer[256]; 275 int num_read; 276 277 do { 278 while ((num_read = posix::Read(fd, buffer, 255)) > 0) { 279 buffer[num_read] = '\0'; 280 error << buffer; 281 } 282 } while (num_read == -1 && errno == EINTR); 283 284 if (num_read == 0) { 285 GTEST_LOG_(FATAL) << error.GetString(); 286 } else { 287 const int last_error = errno; 288 GTEST_LOG_(FATAL) << "Error while reading death test internal: " 289 << GetLastErrnoDescription() << " [" << last_error << "]"; 290 } 291} 292 293// Death test constructor. Increments the running death test count 294// for the current test. 295DeathTest::DeathTest() { 296 TestInfo* const info = GetUnitTestImpl()->current_test_info(); 297 if (info == NULL) { 298 DeathTestAbort("Cannot run a death test outside of a TEST or " 299 "TEST_F construct"); 300 } 301} 302 303// Pin the vtable to this file. 304DeathTest::~DeathTest() {} 305 306// Creates and returns a death test by dispatching to the current 307// death test factory. 308bool DeathTest::Create(const char* statement, const RE* regex, 309 const char* file, int line, DeathTest** test) { 310 return GetUnitTestImpl()->death_test_factory()->Create( 311 statement, regex, file, line, test); 312} 313 314const char* DeathTest::LastMessage() { 315 return last_death_test_message_.c_str(); 316} 317 318void DeathTest::set_last_death_test_message(const String& message) { 319 last_death_test_message_ = message; 320} 321 322String DeathTest::last_death_test_message_; 323 324// Provides cross platform implementation for some death functionality. 325class DeathTestImpl : public DeathTest { 326 protected: 327 DeathTestImpl(const char* a_statement, const RE* a_regex) 328 : statement_(a_statement), 329 regex_(a_regex), 330 spawned_(false), 331 status_(-1), 332 outcome_(IN_PROGRESS), 333 read_fd_(-1), 334 write_fd_(-1) {} 335 336 // read_fd_ is expected to be closed and cleared by a derived class. 337 ~DeathTestImpl() override { GTEST_DEATH_TEST_CHECK_(read_fd_ == -1); } 338 339 void Abort(AbortReason reason) override; 340 bool Passed(bool status_ok) override; 341 342 const char* statement() const { return statement_; } 343 const RE* regex() const { return regex_; } 344 bool spawned() const { return spawned_; } 345 void set_spawned(bool is_spawned) { spawned_ = is_spawned; } 346 int status() const { return status_; } 347 void set_status(int a_status) { status_ = a_status; } 348 DeathTestOutcome outcome() const { return outcome_; } 349 void set_outcome(DeathTestOutcome an_outcome) { outcome_ = an_outcome; } 350 int read_fd() const { return read_fd_; } 351 void set_read_fd(int fd) { read_fd_ = fd; } 352 int write_fd() const { return write_fd_; } 353 void set_write_fd(int fd) { write_fd_ = fd; } 354 355 // Called in the parent process only. Reads the result code of the death 356 // test child process via a pipe, interprets it to set the outcome_ 357 // member, and closes read_fd_. Outputs diagnostics and terminates in 358 // case of unexpected codes. 359 void ReadAndInterpretStatusByte(); 360 361 private: 362 // The textual content of the code this object is testing. This class 363 // doesn't own this string and should not attempt to delete it. 364 const char* const statement_; 365 // The regular expression which test output must match. DeathTestImpl 366 // doesn't own this object and should not attempt to delete it. 367 const RE* const regex_; 368 // True if the death test child process has been successfully spawned. 369 bool spawned_; 370 // The exit status of the child process. 371 int status_; 372 // How the death test concluded. 373 DeathTestOutcome outcome_; 374 // Descriptor to the read end of the pipe to the child process. It is 375 // always -1 in the child process. The child keeps its write end of the 376 // pipe in write_fd_. 377 int read_fd_; 378 // Descriptor to the child's write end of the pipe to the parent process. 379 // It is always -1 in the parent process. The parent keeps its end of the 380 // pipe in read_fd_. 381 int write_fd_; 382}; 383 384// Called in the parent process only. Reads the result code of the death 385// test child process via a pipe, interprets it to set the outcome_ 386// member, and closes read_fd_. Outputs diagnostics and terminates in 387// case of unexpected codes. 388void DeathTestImpl::ReadAndInterpretStatusByte() { 389 char flag; 390 int bytes_read; 391 392 // The read() here blocks until data is available (signifying the 393 // failure of the death test) or until the pipe is closed (signifying 394 // its success), so it's okay to call this in the parent before 395 // the child process has exited. 396 do { 397 bytes_read = posix::Read(read_fd(), &flag, 1); 398 } while (bytes_read == -1 && errno == EINTR); 399 400 if (bytes_read == 0) { 401 set_outcome(DIED); 402 } else if (bytes_read == 1) { 403 switch (flag) { 404 case kDeathTestReturned: 405 set_outcome(RETURNED); 406 break; 407 case kDeathTestThrew: 408 set_outcome(THREW); 409 break; 410 case kDeathTestLived: 411 set_outcome(LIVED); 412 break; 413 case kDeathTestInternalError: 414 FailFromInternalError(read_fd()); // Does not return. 415 break; 416 default: 417 GTEST_LOG_(FATAL) << "Death test child process reported " 418 << "unexpected status byte (" 419 << static_cast<unsigned int>(flag) << ")"; 420 } 421 } else { 422 GTEST_LOG_(FATAL) << "Read from death test child process failed: " 423 << GetLastErrnoDescription(); 424 } 425 GTEST_DEATH_TEST_CHECK_SYSCALL_(posix::Close(read_fd())); 426 set_read_fd(-1); 427} 428 429// Signals that the death test code which should have exited, didn't. 430// Should be called only in a death test child process. 431// Writes a status byte to the child's status file descriptor, then 432// calls _exit(1). 433void DeathTestImpl::Abort(AbortReason reason) { 434 // The parent process considers the death test to be a failure if 435 // it finds any data in our pipe. So, here we write a single flag byte 436 // to the pipe, then exit. 437 const char status_ch = 438 reason == TEST_DID_NOT_DIE ? kDeathTestLived : 439 reason == TEST_THREW_EXCEPTION ? kDeathTestThrew : kDeathTestReturned; 440 441 GTEST_DEATH_TEST_CHECK_SYSCALL_(posix::Write(write_fd(), &status_ch, 1)); 442 // We are leaking the descriptor here because on some platforms (i.e., 443 // when built as Windows DLL), destructors of global objects will still 444 // run after calling _exit(). On such systems, write_fd_ will be 445 // indirectly closed from the destructor of UnitTestImpl, causing double 446 // close if it is also closed here. On debug configurations, double close 447 // may assert. As there are no in-process buffers to flush here, we are 448 // relying on the OS to close the descriptor after the process terminates 449 // when the destructors are not run. 450 _exit(1); // Exits w/o any normal exit hooks (we were supposed to crash) 451} 452 453// Returns an indented copy of stderr output for a death test. 454// This makes distinguishing death test output lines from regular log lines 455// much easier. 456static ::std::string FormatDeathTestOutput(const ::std::string& output) { 457 ::std::string ret; 458 for (size_t at = 0; ; ) { 459 const size_t line_end = output.find('\n', at); 460 ret += "[ DEATH ] "; 461 if (line_end == ::std::string::npos) { 462 ret += output.substr(at); 463 break; 464 } 465 ret += output.substr(at, line_end + 1 - at); 466 at = line_end + 1; 467 } 468 return ret; 469} 470 471// Assesses the success or failure of a death test, using both private 472// members which have previously been set, and one argument: 473// 474// Private data members: 475// outcome: An enumeration describing how the death test 476// concluded: DIED, LIVED, THREW, or RETURNED. The death test 477// fails in the latter three cases. 478// status: The exit status of the child process. On *nix, it is in the 479// in the format specified by wait(2). On Windows, this is the 480// value supplied to the ExitProcess() API or a numeric code 481// of the exception that terminated the program. 482// regex: A regular expression object to be applied to 483// the test's captured standard error output; the death test 484// fails if it does not match. 485// 486// Argument: 487// status_ok: true if exit_status is acceptable in the context of 488// this particular death test, which fails if it is false 489// 490// Returns true iff all of the above conditions are met. Otherwise, the 491// first failing condition, in the order given above, is the one that is 492// reported. Also sets the last death test message string. 493bool DeathTestImpl::Passed(bool status_ok) { 494 if (!spawned()) 495 return false; 496 497 const String error_message = GetCapturedStderr(); 498 499 bool success = false; 500 Message buffer; 501 502 buffer << "Death test: " << statement() << "\n"; 503 switch (outcome()) { 504 case LIVED: 505 buffer << " Result: failed to die.\n" 506 << " Error msg:\n" << FormatDeathTestOutput(error_message); 507 break; 508 case THREW: 509 buffer << " Result: threw an exception.\n" 510 << " Error msg:\n" << FormatDeathTestOutput(error_message); 511 break; 512 case RETURNED: 513 buffer << " Result: illegal return in test statement.\n" 514 << " Error msg:\n" << FormatDeathTestOutput(error_message); 515 break; 516 case DIED: 517 if (status_ok) { 518 const bool matched = RE::PartialMatch(error_message.c_str(), *regex()); 519 if (matched) { 520 success = true; 521 } else { 522 buffer << " Result: died but not with expected error.\n" 523 << " Expected: " << regex()->pattern() << "\n" 524 << "Actual msg:\n" << FormatDeathTestOutput(error_message); 525 } 526 } else { 527 buffer << " Result: died but not with expected exit code:\n" 528 << " " << ExitSummary(status()) << "\n" 529 << "Actual msg:\n" << FormatDeathTestOutput(error_message); 530 } 531 break; 532 case IN_PROGRESS: 533 GTEST_LOG_(FATAL) 534 << "DeathTest::Passed somehow called before conclusion of test"; 535 } 536 537 DeathTest::set_last_death_test_message(buffer.GetString()); 538 return success; 539} 540 541# if GTEST_OS_WINDOWS 542// WindowsDeathTest implements death tests on Windows. Due to the 543// specifics of starting new processes on Windows, death tests there are 544// always threadsafe, and Google Test considers the 545// --gtest_death_test_style=fast setting to be equivalent to 546// --gtest_death_test_style=threadsafe there. 547// 548// A few implementation notes: Like the Linux version, the Windows 549// implementation uses pipes for child-to-parent communication. But due to 550// the specifics of pipes on Windows, some extra steps are required: 551// 552// 1. The parent creates a communication pipe and stores handles to both 553// ends of it. 554// 2. The parent starts the child and provides it with the information 555// necessary to acquire the handle to the write end of the pipe. 556// 3. The child acquires the write end of the pipe and signals the parent 557// using a Windows event. 558// 4. Now the parent can release the write end of the pipe on its side. If 559// this is done before step 3, the object's reference count goes down to 560// 0 and it is destroyed, preventing the child from acquiring it. The 561// parent now has to release it, or read operations on the read end of 562// the pipe will not return when the child terminates. 563// 5. The parent reads child's output through the pipe (outcome code and 564// any possible error messages) from the pipe, and its stderr and then 565// determines whether to fail the test. 566// 567// Note: to distinguish Win32 API calls from the local method and function 568// calls, the former are explicitly resolved in the global namespace. 569// 570class WindowsDeathTest : public DeathTestImpl { 571 public: 572 WindowsDeathTest(const char* a_statement, 573 const RE* a_regex, 574 const char* file, 575 int line) 576 : DeathTestImpl(a_statement, a_regex), file_(file), line_(line) {} 577 578 // All of these virtual functions are inherited from DeathTest. 579 virtual int Wait(); 580 virtual TestRole AssumeRole(); 581 582 private: 583 // The name of the file in which the death test is located. 584 const char* const file_; 585 // The line number on which the death test is located. 586 const int line_; 587 // Handle to the write end of the pipe to the child process. 588 AutoHandle write_handle_; 589 // Child process handle. 590 AutoHandle child_handle_; 591 // Event the child process uses to signal the parent that it has 592 // acquired the handle to the write end of the pipe. After seeing this 593 // event the parent can release its own handles to make sure its 594 // ReadFile() calls return when the child terminates. 595 AutoHandle event_handle_; 596}; 597 598// Waits for the child in a death test to exit, returning its exit 599// status, or 0 if no child process exists. As a side effect, sets the 600// outcome data member. 601int WindowsDeathTest::Wait() { 602 if (!spawned()) 603 return 0; 604 605 // Wait until the child either signals that it has acquired the write end 606 // of the pipe or it dies. 607 const HANDLE wait_handles[2] = { child_handle_.Get(), event_handle_.Get() }; 608 switch (::WaitForMultipleObjects(2, 609 wait_handles, 610 FALSE, // Waits for any of the handles. 611 INFINITE)) { 612 case WAIT_OBJECT_0: 613 case WAIT_OBJECT_0 + 1: 614 break; 615 default: 616 GTEST_DEATH_TEST_CHECK_(false); // Should not get here. 617 } 618 619 // The child has acquired the write end of the pipe or exited. 620 // We release the handle on our side and continue. 621 write_handle_.Reset(); 622 event_handle_.Reset(); 623 624 ReadAndInterpretStatusByte(); 625 626 // Waits for the child process to exit if it haven't already. This 627 // returns immediately if the child has already exited, regardless of 628 // whether previous calls to WaitForMultipleObjects synchronized on this 629 // handle or not. 630 GTEST_DEATH_TEST_CHECK_( 631 WAIT_OBJECT_0 == ::WaitForSingleObject(child_handle_.Get(), 632 INFINITE)); 633 DWORD status_code; 634 GTEST_DEATH_TEST_CHECK_( 635 ::GetExitCodeProcess(child_handle_.Get(), &status_code) != FALSE); 636 child_handle_.Reset(); 637 set_status(static_cast<int>(status_code)); 638 return status(); 639} 640 641// The AssumeRole process for a Windows death test. It creates a child 642// process with the same executable as the current process to run the 643// death test. The child process is given the --gtest_filter and 644// --gtest_internal_run_death_test flags such that it knows to run the 645// current death test only. 646DeathTest::TestRole WindowsDeathTest::AssumeRole() { 647 const UnitTestImpl* const impl = GetUnitTestImpl(); 648 const InternalRunDeathTestFlag* const flag = 649 impl->internal_run_death_test_flag(); 650 const TestInfo* const info = impl->current_test_info(); 651 const int death_test_index = info->result()->death_test_count(); 652 653 if (flag != NULL) { 654 // ParseInternalRunDeathTestFlag() has performed all the necessary 655 // processing. 656 set_write_fd(flag->write_fd()); 657 return EXECUTE_TEST; 658 } 659 660 // WindowsDeathTest uses an anonymous pipe to communicate results of 661 // a death test. 662 SECURITY_ATTRIBUTES handles_are_inheritable = { 663 sizeof(SECURITY_ATTRIBUTES), NULL, TRUE }; 664 HANDLE read_handle, write_handle; 665 GTEST_DEATH_TEST_CHECK_( 666 ::CreatePipe(&read_handle, &write_handle, &handles_are_inheritable, 667 0) // Default buffer size. 668 != FALSE); 669 set_read_fd(::_open_osfhandle(reinterpret_cast<intptr_t>(read_handle), 670 O_RDONLY)); 671 write_handle_.Reset(write_handle); 672 event_handle_.Reset(::CreateEvent( 673 &handles_are_inheritable, 674 TRUE, // The event will automatically reset to non-signaled state. 675 FALSE, // The initial state is non-signalled. 676 NULL)); // The even is unnamed. 677 GTEST_DEATH_TEST_CHECK_(event_handle_.Get() != NULL); 678 const String filter_flag = String::Format("--%s%s=%s.%s", 679 GTEST_FLAG_PREFIX_, kFilterFlag, 680 info->test_case_name(), 681 info->name()); 682 const String internal_flag = String::Format( 683 "--%s%s=%s|%d|%d|%u|%Iu|%Iu", 684 GTEST_FLAG_PREFIX_, 685 kInternalRunDeathTestFlag, 686 file_, line_, 687 death_test_index, 688 static_cast<unsigned int>(::GetCurrentProcessId()), 689 // size_t has the same with as pointers on both 32-bit and 64-bit 690 // Windows platforms. 691 // See http://msdn.microsoft.com/en-us/library/tcxf1dw6.aspx. 692 reinterpret_cast<size_t>(write_handle), 693 reinterpret_cast<size_t>(event_handle_.Get())); 694 695 char executable_path[_MAX_PATH + 1]; // NOLINT 696 GTEST_DEATH_TEST_CHECK_( 697 _MAX_PATH + 1 != ::GetModuleFileNameA(NULL, 698 executable_path, 699 _MAX_PATH)); 700 701 String command_line = String::Format("%s %s \"%s\"", 702 ::GetCommandLineA(), 703 filter_flag.c_str(), 704 internal_flag.c_str()); 705 706 DeathTest::set_last_death_test_message(""); 707 708 CaptureStderr(); 709 // Flush the log buffers since the log streams are shared with the child. 710 FlushInfoLog(); 711 712 // The child process will share the standard handles with the parent. 713 STARTUPINFOA startup_info; 714 memset(&startup_info, 0, sizeof(STARTUPINFO)); 715 startup_info.dwFlags = STARTF_USESTDHANDLES; 716 startup_info.hStdInput = ::GetStdHandle(STD_INPUT_HANDLE); 717 startup_info.hStdOutput = ::GetStdHandle(STD_OUTPUT_HANDLE); 718 startup_info.hStdError = ::GetStdHandle(STD_ERROR_HANDLE); 719 720 PROCESS_INFORMATION process_info; 721 GTEST_DEATH_TEST_CHECK_(::CreateProcessA( 722 executable_path, 723 const_cast<char*>(command_line.c_str()), 724 NULL, // Retuned process handle is not inheritable. 725 NULL, // Retuned thread handle is not inheritable. 726 TRUE, // Child inherits all inheritable handles (for write_handle_). 727 0x0, // Default creation flags. 728 NULL, // Inherit the parent's environment. 729 UnitTest::GetInstance()->original_working_dir(), 730 &startup_info, 731 &process_info) != FALSE); 732 child_handle_.Reset(process_info.hProcess); 733 ::CloseHandle(process_info.hThread); 734 set_spawned(true); 735 return OVERSEE_TEST; 736} 737# else // We are not on Windows. 738 739// ForkingDeathTest provides implementations for most of the abstract 740// methods of the DeathTest interface. Only the AssumeRole method is 741// left undefined. 742class ForkingDeathTest : public DeathTestImpl { 743 public: 744 ForkingDeathTest(const char* statement, const RE* regex); 745 746 // All of these virtual functions are inherited from DeathTest. 747 int Wait() override; 748 749 protected: 750 void set_child_pid(pid_t child_pid) { child_pid_ = child_pid; } 751 752 private: 753 // PID of child process during death test; 0 in the child process itself. 754 pid_t child_pid_; 755}; 756 757// Constructs a ForkingDeathTest. 758ForkingDeathTest::ForkingDeathTest(const char* a_statement, const RE* a_regex) 759 : DeathTestImpl(a_statement, a_regex), 760 child_pid_(-1) {} 761 762// Waits for the child in a death test to exit, returning its exit 763// status, or 0 if no child process exists. As a side effect, sets the 764// outcome data member. 765int ForkingDeathTest::Wait() { 766 if (!spawned()) 767 return 0; 768 769 ReadAndInterpretStatusByte(); 770 771 int status_value; 772 GTEST_DEATH_TEST_CHECK_SYSCALL_(waitpid(child_pid_, &status_value, 0)); 773 set_status(status_value); 774 return status_value; 775} 776 777// A concrete death test class that forks, then immediately runs the test 778// in the child process. 779class NoExecDeathTest : public ForkingDeathTest { 780 public: 781 NoExecDeathTest(const char* a_statement, const RE* a_regex) : 782 ForkingDeathTest(a_statement, a_regex) { } 783 TestRole AssumeRole() override; 784}; 785 786// The AssumeRole process for a fork-and-run death test. It implements a 787// straightforward fork, with a simple pipe to transmit the status byte. 788DeathTest::TestRole NoExecDeathTest::AssumeRole() { 789 const size_t thread_count = GetThreadCount(); 790 if (thread_count != 1) { 791 GTEST_LOG_(WARNING) << DeathTestThreadWarning(thread_count); 792 } 793 794 int pipe_fd[2]; 795 GTEST_DEATH_TEST_CHECK_(pipe(pipe_fd) != -1); 796 797 DeathTest::set_last_death_test_message(""); 798 CaptureStderr(); 799 // When we fork the process below, the log file buffers are copied, but the 800 // file descriptors are shared. We flush all log files here so that closing 801 // the file descriptors in the child process doesn't throw off the 802 // synchronization between descriptors and buffers in the parent process. 803 // This is as close to the fork as possible to avoid a race condition in case 804 // there are multiple threads running before the death test, and another 805 // thread writes to the log file. 806 FlushInfoLog(); 807 808 const pid_t child_pid = fork(); 809 GTEST_DEATH_TEST_CHECK_(child_pid != -1); 810 set_child_pid(child_pid); 811 if (child_pid == 0) { 812 GTEST_DEATH_TEST_CHECK_SYSCALL_(close(pipe_fd[0])); 813 set_write_fd(pipe_fd[1]); 814 // Redirects all logging to stderr in the child process to prevent 815 // concurrent writes to the log files. We capture stderr in the parent 816 // process and append the child process' output to a log. 817 LogToStderr(); 818 // Event forwarding to the listeners of event listener API mush be shut 819 // down in death test subprocesses. 820 GetUnitTestImpl()->listeners()->SuppressEventForwarding(); 821 return EXECUTE_TEST; 822 } else { 823 GTEST_DEATH_TEST_CHECK_SYSCALL_(close(pipe_fd[1])); 824 set_read_fd(pipe_fd[0]); 825 set_spawned(true); 826 return OVERSEE_TEST; 827 } 828} 829 830// A concrete death test class that forks and re-executes the main 831// program from the beginning, with command-line flags set that cause 832// only this specific death test to be run. 833class ExecDeathTest : public ForkingDeathTest { 834 public: 835 ExecDeathTest(const char* a_statement, const RE* a_regex, 836 const char* file, int line) : 837 ForkingDeathTest(a_statement, a_regex), file_(file), line_(line) { } 838 TestRole AssumeRole() override; 839 840 private: 841 // The name of the file in which the death test is located. 842 const char* const file_; 843 // The line number on which the death test is located. 844 const int line_; 845}; 846 847// Utility class for accumulating command-line arguments. 848class Arguments { 849 public: 850 Arguments() { 851 args_.push_back(NULL); 852 } 853 854 ~Arguments() { 855 for (std::vector<char*>::iterator i = args_.begin(); i != args_.end(); 856 ++i) { 857 free(*i); 858 } 859 } 860 void AddArgument(const char* argument) { 861 args_.insert(args_.end() - 1, posix::StrDup(argument)); 862 } 863 864 template <typename Str> 865 void AddArguments(const ::std::vector<Str>& arguments) { 866 for (typename ::std::vector<Str>::const_iterator i = arguments.begin(); 867 i != arguments.end(); 868 ++i) { 869 args_.insert(args_.end() - 1, posix::StrDup(i->c_str())); 870 } 871 } 872 char* const* Argv() { 873 return &args_[0]; 874 } 875 private: 876 std::vector<char*> args_; 877}; 878 879// A struct that encompasses the arguments to the child process of a 880// threadsafe-style death test process. 881struct ExecDeathTestArgs { 882 char* const* argv; // Command-line arguments for the child's call to exec 883 int close_fd; // File descriptor to close; the read end of a pipe 884}; 885 886# if GTEST_OS_MAC 887inline char** GetEnviron() { 888 // When Google Test is built as a framework on MacOS X, the environ variable 889 // is unavailable. Apple's documentation (man environ) recommends using 890 // _NSGetEnviron() instead. 891 return *_NSGetEnviron(); 892} 893# else 894// Some POSIX platforms expect you to declare environ. extern "C" makes 895// it reside in the global namespace. 896extern "C" char** environ; 897inline char** GetEnviron() { return environ; } 898# endif // GTEST_OS_MAC 899 900// The main function for a threadsafe-style death test child process. 901// This function is called in a clone()-ed process and thus must avoid 902// any potentially unsafe operations like malloc or libc functions. 903static int ExecDeathTestChildMain(void* child_arg) { 904 ExecDeathTestArgs* const args = static_cast<ExecDeathTestArgs*>(child_arg); 905 GTEST_DEATH_TEST_CHECK_SYSCALL_(close(args->close_fd)); 906 907 // We need to execute the test program in the same environment where 908 // it was originally invoked. Therefore we change to the original 909 // working directory first. 910 const char* const original_dir = 911 UnitTest::GetInstance()->original_working_dir(); 912 // We can safely call chdir() as it's a direct system call. 913 if (chdir(original_dir) != 0) { 914 DeathTestAbort(String::Format("chdir(\"%s\") failed: %s", 915 original_dir, 916 GetLastErrnoDescription().c_str())); 917 return EXIT_FAILURE; 918 } 919 920 // We can safely call execve() as it's a direct system call. We 921 // cannot use execvp() as it's a libc function and thus potentially 922 // unsafe. Since execve() doesn't search the PATH, the user must 923 // invoke the test program via a valid path that contains at least 924 // one path separator. 925 execve(args->argv[0], args->argv, GetEnviron()); 926 DeathTestAbort(String::Format("execve(%s, ...) in %s failed: %s", 927 args->argv[0], 928 original_dir, 929 GetLastErrnoDescription().c_str())); 930 return EXIT_FAILURE; 931} 932 933// Two utility routines that together determine the direction the stack 934// grows. 935// This could be accomplished more elegantly by a single recursive 936// function, but we want to guard against the unlikely possibility of 937// a smart compiler optimizing the recursion away. 938// 939// GTEST_NO_INLINE_ is required to prevent GCC 4.6 from inlining 940// StackLowerThanAddress into StackGrowsDown, which then doesn't give 941// correct answer. 942bool StackLowerThanAddress(const void* ptr) GTEST_NO_INLINE_; 943bool StackLowerThanAddress(const void* ptr) { 944 int dummy; 945 return &dummy < ptr; 946} 947 948bool StackGrowsDown() { 949 int dummy; 950 return StackLowerThanAddress(&dummy); 951} 952 953// A threadsafe implementation of fork(2) for threadsafe-style death tests 954// that uses clone(2). It dies with an error message if anything goes 955// wrong. 956static pid_t ExecDeathTestFork(char* const* argv, int close_fd) { 957 ExecDeathTestArgs args = { argv, close_fd }; 958 pid_t child_pid = -1; 959 960# if GTEST_HAS_CLONE 961 const bool use_fork = GTEST_FLAG(death_test_use_fork); 962 963 if (!use_fork) { 964 static const bool stack_grows_down = StackGrowsDown(); 965 const size_t stack_size = getpagesize(); 966 // MMAP_ANONYMOUS is not defined on Mac, so we use MAP_ANON instead. 967 void* const stack = mmap(NULL, stack_size, PROT_READ | PROT_WRITE, 968 MAP_ANON | MAP_PRIVATE, -1, 0); 969 GTEST_DEATH_TEST_CHECK_(stack != MAP_FAILED); 970 void* const stack_top = 971 static_cast<char*>(stack) + (stack_grows_down ? stack_size : 0); 972 973 child_pid = clone(&ExecDeathTestChildMain, stack_top, SIGCHLD, &args); 974 975 GTEST_DEATH_TEST_CHECK_(munmap(stack, stack_size) != -1); 976 } 977# else 978 const bool use_fork = true; 979# endif // GTEST_HAS_CLONE 980 981 if (use_fork && (child_pid = fork()) == 0) { 982 ExecDeathTestChildMain(&args); 983 _exit(0); 984 } 985 986 GTEST_DEATH_TEST_CHECK_(child_pid != -1); 987 return child_pid; 988} 989 990// The AssumeRole process for a fork-and-exec death test. It re-executes the 991// main program from the beginning, setting the --gtest_filter 992// and --gtest_internal_run_death_test flags to cause only the current 993// death test to be re-run. 994DeathTest::TestRole ExecDeathTest::AssumeRole() { 995 const UnitTestImpl* const impl = GetUnitTestImpl(); 996 const InternalRunDeathTestFlag* const flag = 997 impl->internal_run_death_test_flag(); 998 const TestInfo* const info = impl->current_test_info(); 999 const int death_test_index = info->result()->death_test_count(); 1000 1001 if (flag != NULL) { 1002 set_write_fd(flag->write_fd()); 1003 return EXECUTE_TEST; 1004 } 1005 1006 int pipe_fd[2]; 1007 GTEST_DEATH_TEST_CHECK_(pipe(pipe_fd) != -1); 1008 // Clear the close-on-exec flag on the write end of the pipe, lest 1009 // it be closed when the child process does an exec: 1010 GTEST_DEATH_TEST_CHECK_(fcntl(pipe_fd[1], F_SETFD, 0) != -1); 1011 1012 const String filter_flag = 1013 String::Format("--%s%s=%s.%s", 1014 GTEST_FLAG_PREFIX_, kFilterFlag, 1015 info->test_case_name(), info->name()); 1016 const String internal_flag = 1017 String::Format("--%s%s=%s|%d|%d|%d", 1018 GTEST_FLAG_PREFIX_, kInternalRunDeathTestFlag, 1019 file_, line_, death_test_index, pipe_fd[1]); 1020 Arguments args; 1021 args.AddArguments(GetArgvs()); 1022 args.AddArgument(filter_flag.c_str()); 1023 args.AddArgument(internal_flag.c_str()); 1024 1025 DeathTest::set_last_death_test_message(""); 1026 1027 CaptureStderr(); 1028 // See the comment in NoExecDeathTest::AssumeRole for why the next line 1029 // is necessary. 1030 FlushInfoLog(); 1031 1032 const pid_t child_pid = ExecDeathTestFork(args.Argv(), pipe_fd[0]); 1033 GTEST_DEATH_TEST_CHECK_SYSCALL_(close(pipe_fd[1])); 1034 set_child_pid(child_pid); 1035 set_read_fd(pipe_fd[0]); 1036 set_spawned(true); 1037 return OVERSEE_TEST; 1038} 1039 1040# endif // !GTEST_OS_WINDOWS 1041 1042// Creates a concrete DeathTest-derived class that depends on the 1043// --gtest_death_test_style flag, and sets the pointer pointed to 1044// by the "test" argument to its address. If the test should be 1045// skipped, sets that pointer to NULL. Returns true, unless the 1046// flag is set to an invalid value. 1047bool DefaultDeathTestFactory::Create(const char* statement, const RE* regex, 1048 const char* file, int line, 1049 DeathTest** test) { 1050 UnitTestImpl* const impl = GetUnitTestImpl(); 1051 const InternalRunDeathTestFlag* const flag = 1052 impl->internal_run_death_test_flag(); 1053 const int death_test_index = impl->current_test_info() 1054 ->increment_death_test_count(); 1055 1056 if (flag != NULL) { 1057 if (death_test_index > flag->index()) { 1058 DeathTest::set_last_death_test_message(String::Format( 1059 "Death test count (%d) somehow exceeded expected maximum (%d)", 1060 death_test_index, flag->index())); 1061 return false; 1062 } 1063 1064 if (!(flag->file() == file && flag->line() == line && 1065 flag->index() == death_test_index)) { 1066 *test = NULL; 1067 return true; 1068 } 1069 } 1070 1071# if GTEST_OS_WINDOWS 1072 1073 if (GTEST_FLAG(death_test_style) == "threadsafe" || 1074 GTEST_FLAG(death_test_style) == "fast") { 1075 *test = new WindowsDeathTest(statement, regex, file, line); 1076 } 1077 1078# else 1079 1080 if (GTEST_FLAG(death_test_style) == "threadsafe") { 1081 *test = new ExecDeathTest(statement, regex, file, line); 1082 } else if (GTEST_FLAG(death_test_style) == "fast") { 1083 *test = new NoExecDeathTest(statement, regex); 1084 } 1085 1086# endif // GTEST_OS_WINDOWS 1087 1088 else { // NOLINT - this is more readable than unbalanced brackets inside #if. 1089 DeathTest::set_last_death_test_message(String::Format( 1090 "Unknown death test style \"%s\" encountered", 1091 GTEST_FLAG(death_test_style).c_str())); 1092 return false; 1093 } 1094 1095 return true; 1096} 1097 1098// Pin the vtable to this file. 1099DeathTestFactory::~DeathTestFactory() {} 1100 1101// Splits a given string on a given delimiter, populating a given 1102// vector with the fields. GTEST_HAS_DEATH_TEST implies that we have 1103// ::std::string, so we can use it here. 1104static void SplitString(const ::std::string& str, char delimiter, 1105 ::std::vector< ::std::string>* dest) { 1106 ::std::vector< ::std::string> parsed; 1107 ::std::string::size_type pos = 0; 1108 while (::testing::internal::AlwaysTrue()) { 1109 const ::std::string::size_type colon = str.find(delimiter, pos); 1110 if (colon == ::std::string::npos) { 1111 parsed.push_back(str.substr(pos)); 1112 break; 1113 } else { 1114 parsed.push_back(str.substr(pos, colon - pos)); 1115 pos = colon + 1; 1116 } 1117 } 1118 dest->swap(parsed); 1119} 1120 1121# if GTEST_OS_WINDOWS 1122// Recreates the pipe and event handles from the provided parameters, 1123// signals the event, and returns a file descriptor wrapped around the pipe 1124// handle. This function is called in the child process only. 1125int GetStatusFileDescriptor(unsigned int parent_process_id, 1126 size_t write_handle_as_size_t, 1127 size_t event_handle_as_size_t) { 1128 AutoHandle parent_process_handle(::OpenProcess(PROCESS_DUP_HANDLE, 1129 FALSE, // Non-inheritable. 1130 parent_process_id)); 1131 if (parent_process_handle.Get() == INVALID_HANDLE_VALUE) { 1132 DeathTestAbort(String::Format("Unable to open parent process %u", 1133 parent_process_id)); 1134 } 1135 1136 // TODO(vladl@google.com): Replace the following check with a 1137 // compile-time assertion when available. 1138 GTEST_CHECK_(sizeof(HANDLE) <= sizeof(size_t)); 1139 1140 const HANDLE write_handle = 1141 reinterpret_cast<HANDLE>(write_handle_as_size_t); 1142 HANDLE dup_write_handle; 1143 1144 // The newly initialized handle is accessible only in in the parent 1145 // process. To obtain one accessible within the child, we need to use 1146 // DuplicateHandle. 1147 if (!::DuplicateHandle(parent_process_handle.Get(), write_handle, 1148 ::GetCurrentProcess(), &dup_write_handle, 1149 0x0, // Requested privileges ignored since 1150 // DUPLICATE_SAME_ACCESS is used. 1151 FALSE, // Request non-inheritable handler. 1152 DUPLICATE_SAME_ACCESS)) { 1153 DeathTestAbort(String::Format( 1154 "Unable to duplicate the pipe handle %Iu from the parent process %u", 1155 write_handle_as_size_t, parent_process_id)); 1156 } 1157 1158 const HANDLE event_handle = reinterpret_cast<HANDLE>(event_handle_as_size_t); 1159 HANDLE dup_event_handle; 1160 1161 if (!::DuplicateHandle(parent_process_handle.Get(), event_handle, 1162 ::GetCurrentProcess(), &dup_event_handle, 1163 0x0, 1164 FALSE, 1165 DUPLICATE_SAME_ACCESS)) { 1166 DeathTestAbort(String::Format( 1167 "Unable to duplicate the event handle %Iu from the parent process %u", 1168 event_handle_as_size_t, parent_process_id)); 1169 } 1170 1171 const int write_fd = 1172 ::_open_osfhandle(reinterpret_cast<intptr_t>(dup_write_handle), O_APPEND); 1173 if (write_fd == -1) { 1174 DeathTestAbort(String::Format( 1175 "Unable to convert pipe handle %Iu to a file descriptor", 1176 write_handle_as_size_t)); 1177 } 1178 1179 // Signals the parent that the write end of the pipe has been acquired 1180 // so the parent can release its own write end. 1181 ::SetEvent(dup_event_handle); 1182 1183 return write_fd; 1184} 1185# endif // GTEST_OS_WINDOWS 1186 1187// Returns a newly created InternalRunDeathTestFlag object with fields 1188// initialized from the GTEST_FLAG(internal_run_death_test) flag if 1189// the flag is specified; otherwise returns NULL. 1190InternalRunDeathTestFlag* ParseInternalRunDeathTestFlag() { 1191 if (GTEST_FLAG(internal_run_death_test) == "") return NULL; 1192 1193 // GTEST_HAS_DEATH_TEST implies that we have ::std::string, so we 1194 // can use it here. 1195 int line = -1; 1196 int index = -1; 1197 ::std::vector< ::std::string> fields; 1198 SplitString(GTEST_FLAG(internal_run_death_test).c_str(), '|', &fields); 1199 int write_fd = -1; 1200 1201# if GTEST_OS_WINDOWS 1202 1203 unsigned int parent_process_id = 0; 1204 size_t write_handle_as_size_t = 0; 1205 size_t event_handle_as_size_t = 0; 1206 1207 if (fields.size() != 6 1208 || !ParseNaturalNumber(fields[1], &line) 1209 || !ParseNaturalNumber(fields[2], &index) 1210 || !ParseNaturalNumber(fields[3], &parent_process_id) 1211 || !ParseNaturalNumber(fields[4], &write_handle_as_size_t) 1212 || !ParseNaturalNumber(fields[5], &event_handle_as_size_t)) { 1213 DeathTestAbort(String::Format( 1214 "Bad --gtest_internal_run_death_test flag: %s", 1215 GTEST_FLAG(internal_run_death_test).c_str())); 1216 } 1217 write_fd = GetStatusFileDescriptor(parent_process_id, 1218 write_handle_as_size_t, 1219 event_handle_as_size_t); 1220# else 1221 1222 if (fields.size() != 4 1223 || !ParseNaturalNumber(fields[1], &line) 1224 || !ParseNaturalNumber(fields[2], &index) 1225 || !ParseNaturalNumber(fields[3], &write_fd)) { 1226 DeathTestAbort(String::Format( 1227 "Bad --gtest_internal_run_death_test flag: %s", 1228 GTEST_FLAG(internal_run_death_test).c_str())); 1229 } 1230 1231# endif // GTEST_OS_WINDOWS 1232 1233 return new InternalRunDeathTestFlag(fields[0], line, index, write_fd); 1234} 1235 1236} // namespace internal 1237 1238#endif // GTEST_HAS_DEATH_TEST 1239 1240} // namespace testing 1241